Online casinos operate by providing a digital platform where players can engage in various gambling games, such as slots, poker, and blackjack. They use random number generators (RNGs) to ensure fair play and randomness in game outcomes. Players create accounts, deposit funds, and can access games via web browsers or dedicated apps. Winnings are calculated automatically, and players can withdraw their earnings through various payment methods. Online casinos are regulated by gaming authorities to ensure compliance with legal standards and to protect players' interests.